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The blockage or closing of a blood vessel or hollow organ.
obstruction, stoppage, block, clotView synonyms
- ‘Two of the 4 patients with cirrhosis had hepatic infusion chemotherapy and therapeutic occlusion of hepatic arteries.’
- ‘The blood vessel wall is usually involved early with resultant hemorrhage, thrombotic occlusion, and lung infarction.’
- ‘Cardiac catheterization can confirm vascular occlusion and angioplasty is frequently used to treat a localized problem.’
- ‘Localized observation of blood vessel stasis, occlusion or vessel dilation have all been observed with Photofrin treatment in vivo.’
- ‘The occlusion rates are close to 100%, higher than published results for surgical ligation.’
count noun A process by which the cold front of a rotating low-pressure system catches up the warm front, so that the warm air between them is forced upwards off the earth's surface between wedges of cold air.
- ‘The second type is a warm occlusion, which occurs when the air behind the front is warmer than the air ahead of the front.’
- ‘In a cold occlusion, the reverse occurs and the occlusion resembles a cold front.’
- 2.1 An occluded front.
- ‘In both types of occlusions, the occluded front has well defined vertical boundaries between the coldest air, the cool air, and the warm air.’
- ‘The meteorological language, which Doogan edits slightly, destabilizes into a poetry of cyclones, occlusions and disturbances.’
The position of the teeth when the jaws are closed.
- ‘The multi-cusped cheek teeth, complex occlusion and extensive palinal power stroke were well suited for shredding fibrous plant material.’
- ‘The initial jaw position was obtained with the teeth in centric occlusion.’
- ‘Posterior teeth may need to be replaced to restore occlusion.’
- ‘The lowered position of these surfaces require downward flexion of the rostrum in order to maintain occlusion of upper and lower incisors.’
Mid 17th century: from Latin occlus- ‘shut up’ (from the verb occludere) + -ion.
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